Cobalt manganese oxides modified titania catalysts for oxidation of elemental mercury at low flue gas temperature

A novel low temperature catalyst regenerated from deactivated SCR catalyst for Hg0 oxidation

“…As shown in Fig. 3b, the peaks of Ti 2p on the surface of DSCR apparently shifted to higher binding energies, which was possibly owing to an improvement in the electron affinity of Ti [4]. However, the binding energies of the elements on the surface of MSCR-II shifted back to the original positions, suggesting the partial regeneration during the MnO x -loading process.…”

“…Hg and its compounds bring much damage to the ecological environment [1].Three forms of Hg exist in the coal-fired flue gas: elemental (Hg 0 ), divalent (Hg 2+ ) and particulate-bound mercury (Hg P ) [2]. Hg 2+ and Hg P are easily removed by conventional air pollution control devices, such as wet flue gas desulfurization (WFGD) systems and electrostatic precipitators (ESP) [3][4][5]. Hg 0 is difficult to be controlled by those devices due to its high volatility and low solubility.…”

“…Noble metal catalysts [11] have been shown with good catalytic capacities for Hg 0 oxidation at lower temperatures, but they are too expensive for large-scale industrial applications. Transition metal oxides catalysts, such as FeO x , MnO x and CoO x [4,[12][13][14][15][16], have been mainly investigated. Among them, the MnO x -based supported catalysts were found to be the most reliable candidates, owing to their excellent catalytic activities at lower temperature.…”

Overlook of carbonaceous adsorbents and processing methods for elemental mercury removal

“…Conversely, elemental mercury is very difficult to be removed because of its high vapor pressure and low water solubility. Thus, control of elemental mercury should be the focus of mercury emissions from coal-fired power plants since it is the most difficult species to be eliminated [13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Plasma-induced adsorption of elemental mercury on TiO 2 supported metal oxide catalyst at low temperatures

“…However, the methods above have crucial drawbacks that constrain the application, including high cost, low adsorption efficiency or oxidation efficiency, and so on. Oxidizing Hg 0 to Hg 2+ is considered as an effective method to enhance mercury removal, especially by SCR catalysts such as V 2 O 5 -WO 3 /TiO 2 [14], Ce-TiO 2 [15] and Mn based catalysts [16,17], which is still at the experimental stage. Non-thermal plasma (NTP), as one of the possible pollutant removal approaches, is a promising prospect for practical applications because of the potential for a significantly reduced investment cost and system size [18][19][20].…”